Maddie and Mackenzie Ziegler gave back in a big way over the past weekend in Los Angeles. Gathering up their closest friends like Lauren Orlando, Bryce Xavier, Kylee Renee, Charlize Glass, and many more, the two dancers and influencers stuffed over 750 backpacks with school supplies for foster care kids in the LA area, just in time for back to school season. The entire group put in notebooks, pens, pencils, erasers, and much needed school supplies that kids need during the upcoming school year.